extern crate nalgebra as na;

use matrixcompare::comparators::{AbsoluteElementwiseComparator, ExactElementwiseComparator};
use matrixcompare::compare_matrices;
use na::{OMatrix, U3, U4};

fn compare_integers_fail() {
    println!("Comparing two integer matrices.");

    #[rustfmt::skip]
    let a = OMatrix::<_, U3, U4>::from_row_slice(&[
        0, 1,  2,  3,
        4, 5,  6,  7,
        8, 9, -2, 11
    ]);

    #[rustfmt::skip]
    let b = OMatrix::<_, U3, U4>::from_row_slice(&[
        0, 1,  2,  3,
        4, 5,  6,  7,
        8, 9, 10, 11
    ]);

    if let Err(err) = compare_matrices(a, b, &ExactElementwiseComparator) {
        println!("{}", err);
    }
}

fn compare_different_size() {
    println!("Comparing matrices of different size.");
    #[rustfmt::skip]
    let a = OMatrix::<_, U3, U3>::from_row_slice(&[
        0, 1,  2,
        4, 5,  6,
        8, 9, 10,
    ]);

    #[rustfmt::skip]
    let b = OMatrix::<_, U3, U4>::from_row_slice(&[
        0, 1,  2,  3,
        4, 5,  6,  7,
        8, 9, 10, 11
    ]);

    if let Err(err) = compare_matrices(a, b, &ExactElementwiseComparator) {
        println!("{}", err);
    }
}

fn compare_f64_abs_tol_fail() {
    println!("Comparing two f64 matrices.");

    #[rustfmt::skip]
    let a = OMatrix::<f64, U3, U3>::from_row_slice(&[
        0.0, 1.0,  2.0 + 1e-10,
        4.0, 5.0,  6.0,
        8.0, 9.0, 10.0,
    ]);

    #[rustfmt::skip]
    let b = OMatrix::<_, U3, U3>::from_row_slice(&[
        0.0, 1.0,  2.0,
        4.0, 5.0,  6.0,
        8.0, 9.0, 10.0
    ]);

    let cmp = AbsoluteElementwiseComparator { tol: 1e-12 };
    if let Err(err) = compare_matrices(a, b, &cmp) {
        println!("{}", err);
    }
}

fn main() {
    // This example mostly serves the purpose of demonstrating the kind of error messages
    // that are given upon comparison failure.
    // The more typical use case is using `assert_matrix_eq!` in tests.
    compare_integers_fail();
    println!("======================================================");
    compare_f64_abs_tol_fail();
    println!("======================================================");
    compare_different_size();
}